Question

(x-12).(2x-22)=0

giúp mik vs

Answer 1

\(=>\left[{}\begin{matrix}x-12=0\\2x-22=0\end{matrix}\right.< =>\left[{}\begin{matrix}x=12\\2x=22\end{matrix}\right.< =>\left[{}\begin{matrix}x=12\\x=11\end{matrix}\right.\)

Answer 2

(x-12).(2x-22)=0

⇒x-12=0 hoặc 2x-22=0

   x=12 hoặc 2x=22

   x=12 hoặc x=22:2

   x=12 hoặc x=11

   vậy x∈{12;11}